Automatic regulating-valve.



PATBNTED JULY 11, 1905.

(L H. CASPA". AUTOMATIC REGULATNG VALVE.

APPLICATION FILED SEPT. 9, 1904.

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@Hoffman GLM/14009@ Myra/za,

iviTED STATES Patented July 11, 1905.

PATENT OEEicE.

AUTOMATIC REGULATlNG-VALVE.

SPECIFICATION forming part of Letters 1 atent N o. 794,394, dated July 11, 1905.

Application led September 9, 1904. Serial No. 223,814.

To all whom, t may concern.-

Be it known that l, CHARLES HAYES CAsPAR, oi' VVilkesbarre, in the county of Luzerne and State of Pennsylvania, have invented a new and Improved Automatic Regulating-Valve,

of which the following is a full, clear, and ex- 1 act description.

My invention relates to improvements in automatic regulating-valves such as are used in connection with air-pressures and particularly in connection with heating, cooling, and Ventilating devices.

My improved valve is particularly to be connected up with the service-pipes in systems of this kind and to act automatically in case of changes in the systemthat is to say, in case compartments or rooms connected with the service-pipe are cut off or cut in to act automatically to keep the pressure, and consequently the temperature, stationary in the connected portions of the system.

Another object ot' my invention is to make the valve extremely simple, so that it cannot get out of repair, and to construct it in such a way that it is balanced, is sensitive, and will act with slight variations of pressure.

To these ends my invention consists of an automatic regulating-valve, the construction and operation oi' which will be hereinafter described and the novel features claimed.

Reference is to be had to the accompanying drawings, forminga part of this specilication, in which similar figures of reference indicate corresponding parts in both the views.

Figure 1 is a sectional elevation of my improved valve, showing the same adapted to operate by the creation of a vacuum or partial vacuuin on one side of the valve; and Fig. 2 is a similar view, but showing the opposite arrangement-that is, with the valve operated by direct pressure instead of by vacuum.

The valve has a suitable casing 10, which at one side has an opening 11, adapted, as shown in Fig. 1, to connect with the outlet to an exliauster, and at the opposite side the valve has a tubular or pipe-like extension 12, which in the figure referred to is the inlet from the service. The part 12 is continued into the main casing 10 to form the opposed diaphragme or partitions 12, which, as the drawing shows,

are merely opposite sides of a tubular partition, lthe same being closed at the inner end, as shown at 13. Through these opposed sides 12a are openings 13 for the passage of air. These openings are adapted to be closed by the valves 111, which in Eig. l are arranged above the respective diaphragme or tube sides 12". The valves, as shown, are at plates merely; but they may be of other suitable shape, and they are carried by acommon valvestem 15, which slides in bearings 16 at the top and bottom of the casing 10. The valves inust, however, be light, flat, and of large area to be suiiciently sensitive. The stem projects through both bearings and at its lower end extends downward into the extension 17 on the under side of the .casing 10 and connects with a piston 18,which is attached to and hermetically sealed in the upper end of. the bellows 19, the bellows and piston constituting together an actuating-diaphragm. The bellows-actuating diaphragm formed by the piston 18 and bellows 19 is very sensitive, and a piston and cylinder, if snfeiently sensitive, might be substituted; but this extreme sensitiveness is necessary, as my device is intended for use with air heating and Ventilating systems and is intended to work under very slight variations of pressure, which would not operate the devices generally employed. in high-pressure service, such as the regulation of steam,compressedair pressures,&c. Opening from below the bellows 19 is a pipe 20, Which communicates with the outer end of the tubular extension 12, as the drawing shows. The compartment formed by the extensions 17 is in communication with the atmosphere through the aperture 17a.

The upper end of the stem 15 connects with the tilting lever or arm 21, which is pivoted in the support 22 and provided with an adjustable weight 23, which balances the valves. An additional weight 24 is also provided, which can be adjusted and which will therefore regulate the pressure which it is desired to maintain and which when varied will cause the valves to work, the one serving when necessary to open the valve and the pressure when increased to close the valves. As the device is intended to be delicate and work on slight 100 variations of pressure, the two weights are really necessary, one being used to keep the parts in static balance and the second to regulate the desired pressure.

Referring to Fig. 1, it will be seen thatwith the system requiring an open connection to the exhauster the valves will be in the position shown and the air will pass freely through the tube 12, the openings 13, and the outlet 11. If now a portion of the service should be cut off, so as to reduce the work of the ex-A hauster, the suction will obviously become greater and the vacuum in the pipe 2O will become stronger, thus pulling down on the piston 18 and partially closing the valves 14 and the openings 13, thereby maintaining the requisite pressure, and if more air is required to be exhausted the vacuum becomes less and the weights 23 and 24 serve to move the valve to a more open position.

As shown in Fig. 2, the construction is exactly as already described, except that the valves 14 are located below the openings 13 for the obvious reason that the structure is worked in the opposite way-that is to say, in this instance the opening 11 serves as the inlet and the tube 12 as the outlet. Moreover, the air is forced in at a pressure necessarily above atmospheric pressure. The arm or lever 21 is also prolonged beyond the stem 15, as shown at 21, and the pressureweight 24 is put on the said extension. If in this arrangement the pressure becomes unnecessarily great, the increase of pressure in the pipe 2O pushes on the piston 10 and raises the valves 14 to a closed or partially-closed position, while the decrease of pressure permits the lowering of the valves under the action of the weights 23 and 24.

In both cases it will be seen that the action is automatic and that the valve can be adjusted so as to maintain the required pressure to a nicety. i

In 'the drawings I have shown weights as being opposed to the action behind the piston 18; but-obviously springs would be equivalent.

Having thus fully described my invention, I claim `as new and desire to secure by Letters Patent 1. A device of the kind described comprising a valve-casing having suitable inlet and outlet openings, a tubular structure extending from one of the openings into the casing, said structure having' openings therethrough -on opposite sides, a pair of balancedvalves connected together and arranged to close the aforesaid openings, an actuating-diaphragm 1n communication with the atmosphere con- Vnected with the valves and comprising a bellows and piston, and a free open communicationbetween a part of the valve-casing and the aforesaid bellows.

2. A device of the kind described, comprising a valve-casing having a suitable inletand outlet, a tubular structure extending from one of the openings into the valve-casing' and provided with air-openings on opposite sides, a pair of balanced valves to close the said openings the said valves being connected so as to work in unison, an actuating-diaphragm in communication with the atmosphere connected to the valves, and a free open-pipe connection between the actuating-diaphragmand the aforesaid tubular structure.

3. A device of the kind described, comprising a valve-casing having a suitable inletand outlet, a tubular structure extending from one of the said openings into the valve-casing, the said tubular structure having air-openings in its opposite walls, a pair of connected platevalves to close the aforesaid openings, means for balancing the valves, an actuating-diaphragm in communication with the atmosphere connected with the valves, and a free open-pipe connection between a part of the valve-casing andthe actuating-diaph ragm.

4. In a device of the character described, a valve-casing having' a suitable inlet and outlet, a tubular structure extending from one of the openings to within the valve-casing, said tubular structure having openings in its oppositie walls, la compartment'formed on the casing, said compartment being in communication with the atmosphere, valves for closing the openings of the tubular body, a stem for said valves, said stem passing' through the casing to within the compartment, an actuatingdiaphragm within the compartment to which the stem is connected, and a free open pipe connection between the actuating-diaphragm and the valve-casing, said connection or pipe terminating at the compartment beneath the diaphragm.

cHARLEs HAYES cAsPAR.

W itnesses:

JOSEPH J. BAER, HENRY T. SCHULZ.

IOO 

